OCF antennas are very convenient as they will allow multiple bands of operation with a simple wire antenna which is fed off center with a 4:1 OCF Current balun with built in feed line choke,
RFI/EMI Solutions from KHz to GHz
Ferrite Snap On, ID = .26 in/6.6mm, Mix 31
Excellent for RFI/Noise reduction for AV cable, Coaxial Audio, Audio Power Line, IP Serial Port Camera, Computer USB, etc.,